The Judas Window by John Dickson Carr (writing as Carter Dickson). One of the five best locked room mysteries, as selected by 14 established mystery authors and critics (All But Impossible!, 1981. ed. E. Hoch). The Case: Avory Hume is found dead with an arrow through his heart—in a study with bolted steel shutters and a heavy door LOCKED FROM THE INSIDE. In the same room James Caplon Answell li...